Late in the second period, Koivu was struck by Columbus’ Brandon Dubinsky after passing a puck into the Blue Jackets’ zone. Koivu had to be helped from the ice and didn’t return; Dubinsky was ejected.

The NHL protocol for a player who is knocked unconscious is to have the player undergo medical evaluation and follow-up tests as Ducks forward Dustin Penner was after being knocked out by Colorado’s Ryan Garbutt on Oct. 20, returning to the team for Sunday’s game.

Fasth, meanwhile, suffered a lower-body injury at the end of practice Oct. 17 and hasn’t played since as call-up Frederik Andersen has gone 3-0, including Sunday’s victory.

Fasth will receive physical therapy in Anaheim, a team spokesman said.

The Ducks, preparing to play again Tuesday in Philadelphia, called up center Rickard Rakell from the team’s minor-league affiliate in Norfolk, Va., on Monday.